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Winter interactions between weather regimes and marine surface in the North Atlantic European region
Author(s) -
Guemas Virginie,
SalasMélia David,
Kageyama Masa,
Giordani Hervé,
Voldoire Aurore,
SanchezGomez Emilia
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2009gl037551
Subject(s) - climatology , ridge , sea surface temperature , atmosphere (unit) , mid atlantic ridge , environmental science , geology , oceanography , atmospheric sciences , geography , meteorology , paleontology
This study aims at understanding the winter marine surface/atmosphere interactions in the North Atlantic European (NAE) region on intraseasonal timescales. The CNRMOM1d ocean model coupled with the GELATO3 sea ice model is forced with the ERA40 surface fluxes over the 1959–2001 period. Composites of the simulated Sea Surface Temperature (SST) and sea ice concentration anomalies associated with each weather regime are computed. These are then prescribed to the ARPEGE Atmosphere General Circulation Model. We show that the interaction with the marine surface induces a negative feedback on the persistence of the NAO– regime, favours the transition from the Zonal regime toward the Atlantic Ridge regime and destabilizes the transition from the Blocking regime toward the Atlantic Ridge regime.